Migrated to: https://www.printables.com/model/543306-potentiometer-shaft-adapter-extender-updated-1222 My late Mom's old Panasonic table radio needed its volume control (with integrated power switch) replaced. The replacement parts would apparently be considered vintage now, but Philmore sells an appropriate value pot with an integrated switch. The only problem: it has a D-shaft, where Mom's radio knobs are for split-spline shafts. No problem: I printed a shaft extender! See the instructions below.